Question: What method  was used the to determine the population of Naples as 989789.0?
Paraphrase: How was the population of Naples determined to be 989789?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q2634 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '989789.0')) . ?s pq:P459 ?value}